KR101992658B1 - Sealing tape attaching apparatus for secondary battery manufacturing - Google Patents

Abstract

The present invention relates to a tape pulling unit configured to pull a tape, a cutter configured to cut a tape, a taping head configured to adjust an adsorption area so that the cut tape having different sizes can be picked up, And a controller for controlling the relative distance between the tape pulling unit and the cutter so as to cut the taping head to a predetermined length and controlling the absorption area of the taping head according to the set length, .
The apparatus for attaching a finishing tape for secondary battery manufacturing according to the present invention can cut tapes by adjusting the length of the finishing tape and by adjusting the area of adsorption on the taping head, taping according to various types and sizes is possible.

Description

Technical Field [0001] The present invention relates to a sealing tape attaching apparatus for securing secondary batteries,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a finishing tape attaching apparatus for manufacturing a secondary battery, and more particularly, to a finishing tape attaching apparatus for manufacturing a secondary battery capable of adjusting the length and width of a tape.

Generally, a secondary battery is a battery which can be repeatedly used through a discharge process of converting chemical energy into electrical energy and a charging process in the reverse direction. Examples of the secondary battery include a nickel-cadmium (Ni-Cd) battery, a nickel- A lithium-metal battery, a lithium-ion (Ni-Ion) battery, and a lithium-ion polymer battery.

The secondary battery is composed of an anode, a cathode, an electrolyte, and a separator, and stores and generates electricity using voltage difference between different anode and cathode materials. Here, the discharge is to move electrons from a cathode having a high voltage to a cathode having a low voltage (generating electricity as much as the voltage difference of the anode), and charging means transferring the electrons again from the anode to the cathode where the anode material receives electrons and lithium ions And returned to the original metal oxide. That is, when the secondary battery is charged, the charge current flows as the metal atoms move from the anode to the cathode through the separator, and when discharged, the metal atoms move from the cathode to the anode and the discharge current flows.

In the apparatus for winding a strip-shaped electrode plate or stacking individual electrode plates in the manufacture of a secondary battery, after a predetermined length of the electrode plate required for the secondary battery is wound or stacked, And then taping to fix it. In this case, a series of roller devices are fixed to the cut film immediately after the winding is finished, and the tape is stuck in this state so that the separator does not deviate from the predetermined position until the finish tape is attached after cutting the film. The shape of the inside of the electrode body may be disturbed when the electrode body is pulled out without fully fixing the electrode body before attaching the finishing tape. In particular, in the case of a large cell, since the size of the electrode body itself is large, When the shim is removed, the shape of the inside of the electrode can easily be disturbed.

Therefore, the finishing tape is stuck in the inside of the electrode body in the state of being wound. In addition, it is possible to work regardless of the position (wide side, narrow side, or edge) attached to the electrode body by attaching the finishing tape in the state that the electrode body is wound around the core.

The finish tape is applied differently depending on the size and position of the electrode body. When the finishing tape is widened, the tape is folded or bubbles are generated in the tape, which affects the thickness of the J / R. Therefore, a thin tape is attached. In this case, a plurality of tape attachment units are required or a repeated operation is required to obtain a certain level of bond strength.

A Korean Patent Registration No. 1200277 (published on Nov. 12, 2012) regarding taping devices among such secondary battery manufacturing devices is disclosed. However, in the past, only a single-size tapes can be attached to the taping device, so that it is necessary to replace the tapes in order to attach the taping in various sizes.

Korean Registered Patent No. 1200277 (Notice of November 12, 2012)

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus for attaching a finishing tape for manufacturing secondary batteries, which can cut and attach tapes of various sizes in order to solve the above-mentioned conventional problems.

As a means for solving the above-mentioned problems, there is a tape pulling unit configured to pull the tape, a cutter configured to cut the tape, a taping unit configured to adjust an adsorption area so that the cut tape having different sizes can be picked up And a controller for controlling a relative distance between the tape pulling unit and the cutter so as to cut the head and the tape to a predetermined length and controlling the absorption area of the taping head according to the set length, May be provided.

Here, the taping head can be constructed so as to take the tape cut from the tape pulling unit and to wind the tape around the outer surface as it rotates.

The control unit may be configured to adjust the rotation angle of the tapping head according to the set length of the cut tape upon acceptance.

The control unit may be configured to adjust the amount of rotation of the taping head according to the set length when the cut tape is attached to the electrode body.

On the other hand, the taping head may include a plurality of vacuum port arrays formed on the outer surface in the circumferential direction.

On the other hand, the control unit may control the selection of whether or not to open the plurality of vacuum port arrays according to the set length to perform the adsorption.

Further, it may further comprise a sealing part configured to seal the unused vacuum port of the vacuum port according to the width of the tape.

Here, the sealing portion may be composed of an inner drum closely attached to the inner surface of the tapping head and configured to be relatively rotatable with the taping head.

Furthermore, the inner drum may have a plurality of slits corresponding to the plurality of vacuum ports, and the inner drum may be configured such that the length in the rotating direction gradually increases or decreases gradually depending on the angle.

On the other hand, the length of the longest slit among the plurality of slits may be configured to be shorter than the separation distance in the rotational direction between the plurality of vacuum ports.

The control unit may be configured to adjust the number of the vacuum ports to be sealed by rotating the inner drum relative to the taping head according to the set length.

Furthermore, the control unit can be configured to control the traction length of the tape pulling unit to be adjusted so as to cut the tape to a set length.

The control unit can control the position of the cutter so as to cut the tape at the set length.

The apparatus for attaching a finishing tape for secondary battery manufacturing according to the present invention can cut tapes by adjusting the length of the finishing tape and by adjusting the area of adsorption on the taping head, taping according to various types and sizes is possible.

1 is a block diagram showing the concept of the first embodiment according to the present invention.
2 is a perspective view of the first embodiment.
Fig. 3 is an enlarged perspective view of the taping head portion of Fig. 2; Fig.
Figure 4 is an exploded perspective view of the Figure 2 taping head.
5 is a view showing an internal channel in operation of the taping head.
FIG. 6 is a view showing an inner channel when the inner drum rotates at a predetermined angle in FIG.
Figs. 7 to 12 are use state diagrams of the first embodiment. Fig.
13 is a flowchart of a method for attaching a finishing tape for manufacturing a secondary battery according to a second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus for attaching a finishing tape for manufacturing a secondary battery according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the embodiments, the names of the respective components may be referred to as other names in the art. However, if there is a functional similarity and an equivalence thereof, the modified structure can be regarded as an equivalent structure. In addition, reference numerals added to respective components are described for convenience of explanation. However, the contents of the drawings in the drawings in which these symbols are described do not limit the respective components to the ranges within the drawings. Likewise, even if the embodiment in which the structure on the drawing is partially modified is employed, it can be regarded as an equivalent structure if there is functional similarity and uniformity. Further, in view of the level of ordinary skill in the art, if it is recognized as a component to be included, a description thereof will be omitted.

Hereinafter, the construction of a finishing tape attaching apparatus 1 for manufacturing a secondary battery according to the present invention will be described with reference to Figs. 1 and 2. Fig.

Fig. 1 is a block diagram showing the concept of the first embodiment according to the present invention, and Fig. 2 is a perspective view of the first embodiment. A tape pulling unit 30, a cutter 20, a tape feeding unit 10, a taping head 40, an input unit, and a control unit.

The apparatus for attaching a finishing tape 1 according to the present invention is constructed so that the end of a separation membrane can be fixed to the outer surface by attaching a finishing tape to the outer surface wrapped and wrapped around the separation membrane at the time of finishing a plurality of stacked or wound rechargeable battery assemblies.

The tape pulling unit 30 is configured to be able to transport the supplied tape to the tapping head 40. [ The tape pulling unit 30 may be configured to include a tape attaching portion and a driving portion. The taping attachment portion is configured to be capable of sucking or attaching the end side of the tape. The driving unit is configured to linearly move the tape pulling unit (30) and can be configured to include a linear actuator. The tape pulling unit 30 fixes the end of the tape, pulls it up to a predetermined length, takes over the taping drum to be described later, and repeats the same operation repeatedly.

The cutter 20 is configured to cut a tape to be attached to a predetermined length. The cutter 20 is configured to move in a direction perpendicular to the tape to cut the tape. At this time, the cutter 20 may be configured to perform cutting from the non-adhesive side so as to prevent sticking to the tape. The cutter 20 is provided between the tape pulling unit 30 and the tape feeding unit 10 so that the cut pieces of the tape are fixed to the tape pulling unit 30 while the rest is fixed to the tape feeding unit 10, As shown in FIG. The cutter 20 may be connected to the cutter driving unit 20 for driving the cutter 20 in the vertical direction and may be provided with a separate driving unit so that the cutter 20 can move in the longitudinal direction. A description thereof will be omitted.

The tape supply unit 10 is configured to supply the tape with the tape raw material from the tape roll. The tape supply unit 10 is configured to be capable of being transported in a straight line for cutting the tape, and when the cutting is performed, the temporary fixing portion 11 is configured to temporarily fix the cut end. The tape traction unit 30 transports the tape to the taping head 40 during the cutting and then the temporary fixing unit 11 and the tape traction unit 11 are fixed so that the end of the tape fixed to the temporary fixing unit 11 can be fixed, The portion where the unit 30 abuts can be formed in a corresponding shape such as a concavo-convex shape. The tape supply unit 10 may be configured to be spaced apart from the tape-facing surface by a predetermined distance so that the tape-pulling unit 30 does not adhere to the other structure when the tape-pulling unit 30 pulls the tape.

The taping head 40 is configured to attach the tape received from the tape pulling unit 30 to the electrode body 3. [ The taping head 40 is formed in a cylindrical shape, and is configured to adjust an adsorption area according to the size and length of the tape. The taping head 40 may comprise an inner drum 42 and an outer drum 41, a servo motor, a urethane coating and a vacuum port 44. The vacuum port is formed around the taping head 40 at a predetermined interval. The vacuum port 44 is formed in a plurality of rows in the longitudinal direction, and each column may be provided with a vacuum port 44 at predetermined angles. The vacuum port 44 may be formed in a number corresponding to the inner drum 42 and the outer drum 41. The shape of the vacuum port 44 is such that the inner drum 42 is connected to the vacuum port 44 constituted by the slits 45, Can be configured to vary in length. The external drum 41 is hermetically sealed except for the vacuum port 44 and is provided with a suction port in fluid communication with an external vacuum pump to reduce the pressure inside the drum. At this time, relative movement with the external drum 41 may be generated, and the sealing of the vacuum port 44 may be determined for each angle. The taping head 40 may be configured to include an external drum 41 and an internal drum 42. The taping head 40 may be configured to generate a relative angle difference between the external drum 41 and the internal drum 42 using a servo motor, . The taping head 40 may be configured to be connected to the tapping head arm 50 and perform other functions at a position that varies depending on the rotation of the arm. In other words, at the position where the tape is taken, the tape is adsorbed by varying the area to be absorbed corresponding to the size of the tape. The tapping head arm 50 is rotated in the adsorbed state to move to the tape attachment position, So that the vacuum adsorption can be partially released. On the other hand, when the inner drum is moved in the longitudinal direction, the entire vacuum port 44 is sealed, and at this time, the plurality of inner drums can be individually positioned and functioned as a sealing portion. At this time, urethane coding may be provided on the contact surface with the tape so that taping can be smoothly adhered to the outer surface. However, urethane coating is only one example, and it can be applied to various elastic materials and materials with high frictional properties, which are useful for vacuum adsorption.

The input unit 60 is configured so that the user can select the set length of the tape. Here, the set length means the length of the tape operation desired by the user. The input unit 60 may be configured to select a cut length of the tape to a preset value according to the type and size of the electrode unit 3 and may be configured to be adjustable in length according to a user's input. In this case, when the cut tape is wound around the taping head 40 by one turn or more, it is difficult to attach the cut tape to the electrode body 3 due to the inter-tape bonding, May be set to be shorter than the outer circumferential length of the outer circumferential portion.

The control unit 70 is configured to control the tape pulling unit 30, the cutter 20, and the taping head 40 so that the tape can be cut and attached according to the length inputted from the input unit 60. [ The control unit 70 is configured to cut the tape by adjusting the relative length between the tape pulling unit 30 and the cutter 20 according to the inputted set length. At this time, only the tape pulling unit 30 can be moved along the length, or the cutter 20 can be moved simultaneously to perform cutting. If the set length is longer than the maximum pulling length possible by the operation of the tape pulling unit 30, the control unit 70 controls the cutting operation to be performed after the predetermined length is absorbed to the tapping head 40 by interlocking with the tapping head 40 can do. Further, when the set length is set shorter than the pulling length of the tape pulling unit 30, it can be controlled so as to be pulled by the tape pulling unit 30 and then cut and adsorbed to the taping head 40. [

Hereinafter, the configuration of the tapping head 40 will be described in detail. FIG. 3 is an enlarged perspective view of the taping head 40 of FIG. 2, and FIG. 4 is an exploded perspective view of the taping head 40 of FIG. 5 is a view showing the vacuum port 44 when the taping head 40 is operated, and FIG. 6 is a view showing the vacuum port 44 when rotated at a predetermined angle in FIG. In FIGS. 5 and 6, the inner and outer drums are shown, and a symbol indicating whether or not the vacuum port 44 is sealed is shown on the outer side, which means the vacuum port 44 in which the hollow circle is opened.

As shown in the figure, the vacuum ports 44 formed in the tapping head 40 are arranged and arranged in plural, and the adsorption area can be adjusted in the width direction and the circumferential direction. The taping head 40 slowly attracts the tape so that the adhesive surface of the tape can be directed to the outside, and when the electrode body 3 is in contact with the tape, it is slowly rotated so that it can be attached to the electrode body 3 with its own adhesive force Taping is performed.

At this time, one surface of the tape to be adsorbed to the tapping head 40 is in a state of no adhesive force, and the adsorption is determined depending on the degree of vacuum of the tapping head 40. If the vacuum ports 44 of the tapping head 40 are connected to each other, if the tape is partially open, the vacuum is suddenly released and the tape can not be sucked smoothly. Thus, the taping head 40 is configured such that a vacuum is formed in an area corresponding to the length of the cut tape piece.

4, the taping head 40 may be configured to include an outer drum 41, an inner drum 42, and a cap 43. As shown in FIG. As described above, the inner drum 42 is disposed inside the outer drum 41, and the inner drum 42 is configured to be adjustable in the longitudinal direction and angle by using the motor. The inner drum 42 may be constituted by a plurality of units and may be configured to be adjustable for each part.

The cap 43 is fixed to the outer drum 41 so that a vacuum pressure can be formed inside.

Referring to FIG. 5, there is shown an adsorption area that varies depending on the relative angle between the outer drum 41 and the inner drum 42.

The external drums 41 are formed with 24 vacuum ports 44 at equal intervals, and are formed with the same inner diameters. The inner drum 42 is formed with 24 slits 45 which are the same number as the outer drum 41 and the length of the slit 45 formed in the clockwise direction is reduced. The slit 45 of the inner drum 42 is configured such that the longest slit 45 is shorter than the gap between the vacuum ports 44 to seal the vacuum port 44 sequentially in accordance with the angle. Here, the smallest slit 45 among the slits 45 of the inner drum becomes the reference position, and when the inner drum is rotated, the vacuum port 44 is sealed from the portion where the smallest slit 45 is located. As the rotational angle gradually increases, the sealing is gradually made from the portion where the smallest slit 45 is located. When the inner drum 42 is rotated in the clockwise direction on the drawing, the sealing is started from the vacuum port 44 arranged at 12 o'clock, and the sealing is sequentially performed in the counterclockwise direction.

Here, the relative angle difference between the inner drum 42 and the outer drum 41 for sealing can be 360 ° / the number of the vacuum ports 44. Therefore, in the present embodiment, 24 vacuum ports 44 are formed, and when the angle is rotated 15 degrees, the entire vacuum port 44 is sealed. In this case, when changing the position where the sealing is started, the position of the smallest slit 45 among the inner drums 42 can be changed to the sealing start position and changed.

6, the sealing range can be determined by rotating the number of the sealing angle / vacuum port 44 only. When the sealing is started at 11 o'clock and is to be sealed by 45 degrees, it is possible to determine the sealing range by rotating the inner drum 42 at an angle of 45 ° / 24 = 1.875 ° at the sealing start position. Except the closed range, the remaining part becomes the open part and the adsorption is made. However, the number of the vacuum port 44 and the number of the slits 45 is only one example, and may be various numbers.

The control unit 70 determines the sealing start position and the sealing range according to the set length and rotates the inner drum 42 so that an adsorption area corresponding to the set length can be formed. In general, when the set length is inputted, taping is performed on the plurality of electrode bodies 3, so that when the inner drum 42 is rotated, the inner drum 42 and the outer drum 42 are rotated, (41) can be fixed.

Hereinafter, the operation of the embodiment according to the present invention will be described in detail with reference to FIG. 7 to FIG. The operation according to this drawing is shown when the set length is longer than the operating range of the tape pulling unit 30. It should be noted that FIGS. 7 to 12 are simplified symbols for describing each element in order to explain the operation, and the present invention is not limited to the shapes and configurations shown in the drawings.

7 shows an initial state of taping and shows a state in which the end of the tape transferred from the tape supply unit 10 is attached to the temporary fixing unit 11 and the tape pulling unit 30 is attached to the end To prepare for traction.

8 corresponds to a step in which the end of the tape is attached to the tape pulling unit 30 and the tape is pulled out. Here, the temporary fixing part 11 is located at a lowered position for smooth drawing when the tape is pulled.

Fig. 9 shows a state in which the tape is transferred to the taping head 40. Fig. The taping head 40 takes over the end of the tape and rotates it at a predetermined angle to pick up the tape. At this time, the vacuum port 44 can be opened and adsorbed to the point where the tape contacts according to the amount of rotation. The adjustment of the adsorption area can be performed by adjusting the angle between the inner drum 42 and the outer drum 41 .

10 shows a state at the time of cutting. In the cutting, the rotation of the tapping head 40 is temporarily stopped, and the temporary fixing portion 11 is fixed to the tape to fix the tape before and after the cutter 20 And the tape pulling unit 30 is disposed on the end side of the cut tape, so that the tape portion that has not yet been attracted can be temporarily attracted and fixed. Here, the portion of the non-adsorbed tape may be determined to be secondarily adsorbed to the tape pulling unit 30 according to the set length. That is, when the set length is relatively short, when a part of the tape is adsorbed to the taping head 40, the remaining part is less struck by self-elasticity and therefore, no separate adsorption is required, The tape may be temporarily adhered to the tape pulling unit 300 so that the tape is attracted to the taping head 40, and the tape can be slowly moved as it is, and finally the takeover of the tape can be terminated.

11 shows a state in which the tapping head 40 is further rotated to absorb the remaining portion. After transferring the tape to the taping head 40, the tape pulling unit 30 is retracted to reattach the end of the tape for re-execution of the next cycle.

12 shows a state in which the tapping head arm 50 is rotated to closely contact the electrode body 3 and then taping is performed on the outer surface of the electrode body 3. FIG. It is possible to stop the rotation when the entirety of the tape that has been attracted to the electrode body 3 is attached. At this time, it is possible to adjust the area of the vacuum port 44 which is sealed to secure a portion where the tape is peeled off from the tapping head 40.

Hereinafter, a method for attaching a finishing tape for manufacturing a secondary battery according to a second embodiment of the present invention will be described in detail with reference to FIG.

13 is a flowchart of a method for attaching a finishing tape for manufacturing a secondary battery according to a second embodiment of the present invention. In this embodiment, an attachment method performed when the set length is shorter than the operation distance of the traction unit will be described.

As shown in the figure, the method for attaching the finishing tape for secondary battery manufacturing according to the present invention includes a setting length input step S100, a parameter setting step S200, a tape pulling step S300, a cutting step S400, (S500), a tape full absorption step (S600), and an electrode body taping step (S700).

The set length input step S100 corresponds to a step of receiving a length of a tape to be attached from a user. It is possible to input the width of the tape including the length of the tape. However, by selecting the type or size of the electrode, it can be loaded from the size data of the tape to be attached.

 The parameter setting step S200 corresponds to a step of calculating a rotation angle according to the diameter of the taping drum and a pulling distance of the tape pulling unit from the set length inputted from the set length input step.

The tape pulling step S300 corresponds to the step of picking up and towing a part of the tape. At this time, since the set length is shorter than the working distance of the pulling unit, the tape is pulled by the set length.

The cutting step corresponds to the step of cutting the tape to the set length (S400).

The tape partial adsorption step (S500) corresponds to a step of adsorbing a part of the tape at the taping head to take the tape from the tape pulling unit to the taping head. At this time, the taping head is configured to absorb the non-adhesive surface of the tape.

The whole tape adsorption step (S600) corresponds to the step of adsorbing the whole tape piece by gradually increasing the adsorption area by adjusting the adsorption area while rotating the taping head.

The taping step S700 of the electrode body corresponds to the step of moving the taping head to the electrode body side, bringing the electrode body into contact with the tape, and then rotating the taping head and the electrode body together to attach the tape to the electrode body.

As described above, the apparatus for attaching a finishing tape for manufacturing secondary batteries according to the present invention can cut tapes by adjusting the length of the finishing tape and attaching the tapes by adjusting the area of adsorption in the taping head.

1: Finishing tape attaching device
2: tape
3: Electrode body
10: tape supply unit
11: Temporary Fixing Section
20: Cutter
30: Tape traction unit
40: Taping head
41: outer drum
42: inner drum
43: Cap
44: Vacuum port
45: slit
50: taping head arm
60: Input unit
70:
S100: Setting length input step
S200: Parameter setting step
S300: tape pulling step
S400: Cutting step
S500: Tape partial adsorption step
S600: All of the tape adsorption step
S700: taping step on the electrode body

Claims (13)

A tape pulling unit configured to pull the tape;
A cutter configured to cut the tape;
A tapping head configured to receive the tape from the tape pulling unit and configured to adjust an adsorption area so that the cut tape having different sizes can be picked up; And
And a control unit for controlling operations of the tape pulling unit, the cutter, and the tapping head,
Wherein,
Adjusting a relative distance between the tape pulling unit and the cutter so that the tape can be cut to a predetermined length when the set length of the tape varies according to a user's input, and adjusting an absorption area of the taping head according to the set length Control,
And an inner drum closely attached to the inner surface of the tapping head and configured to rotate relative to the tapping head to adjust the adsorption area. The method according to claim 1,
The taping head comprises:
Taking the cut tape from the tape pulling unit,
And the tape can be attracted to the outer surface of the outer tube when the outer tube is rotated. The method according to claim 1,
Wherein,
Wherein the rotation angle of the tapping head is adjusted according to the set length when the cut tape is received. The method of claim 3,
Wherein,
And adjusts the amount of rotation of the tapping head according to the set length when the cut tape is attached to the electrode body. 3. The method of claim 2,
The taping head comprises:
And a plurality of vacuum port arrays formed on the outer surface in a circumferential direction. 6. The method of claim 5,
Wherein,
Wherein the position of the inner drum is controlled so as to perform attraction by selecting whether or not to open the plurality of vacuum port arrays according to the set length. 6. The method of claim 5,
Wherein the inner drum is configured to seal an unused vacuum port of the vacuum port according to a width of the tape. delete 8. The method of claim 7,
The internal drum
A plurality of slits are formed corresponding to the plurality of vacuum ports,
And the length in the rotating direction is gradually increased or decreased according to the angle. 10. The method of claim 9,
Wherein a length of the longest slit of the plurality of slits is shorter than a distance in the rotation direction between the plurality of vacuum ports. 11. The method of claim 10,
Wherein,
Wherein the inner drum is rotated relative to the taping head according to the set length to adjust the number of the vacuum ports to be sealed. 12. The method of claim 11,
Wherein,
And controls the pulling length of the tape pulling unit so as to cut the tape with the set length. 13. The method of claim 12,
Wherein,
And controls the position of the cutter so as to cut the tape with the set length.

Images